Searched for:
(1 - 20 of 79)

Pages

document
Fokker, P.A. (author), Salina Borello, E. (author), Verga, F. (author), Viberti, D. (author)
Harmonic testing was developed as a form of well testing that can be applied during ongoing production or injection operations, as a pulsed signal is superimposed on the background pressure trend. Thus no interruption of well and reservoir production is needed before and during the test. If the pulsed pressure and rate signal analysis is...
article 2018
document
Bijl, P.K. (author), Houben, A.J.P. (author), Bruls, A. (author), Pross, J. (author), Sangiorgi, F. (author)
There is growing interest in the scientific community in reconstructing the paleoceanography of the Southern Ocean during the Oligocene-Miocene because these time intervals experienced atmospheric CO2 concentrations with relevance to our future. However, it has remained notoriously difficult to put the sedimentary archives used in these efforts...
article 2018
document
Chen, J. (author), Niemeijer, A.R. (author), Fokker, P.A. (author)
Laboratory and numerical studies, as well as field observations, indicate that phase transitions of pore water might be an important process in large earthquakes. We present a model of the thermo-hydro-chemo-mechanical processes, including a two-phase mixture model to incorporate the phase transitions of pore water, occurring during fast slip (i...
article 2017
document
Liu, J. (author), Fokker, P.A. (author), Spiers, C.J. (author)
We construct theoretical models for time-dependent swelling of coal matrix material upon adsorption of a single gas, taking into account a coupling between stress, strain, chemical potential, and diffusion. Two models are developed. The first (model A) corresponds to diffusion and hence swelling rates being controlled by the jump frequency of...
article 2017
document
Westerhoff, W. (author), Donders, T. (author), Luthi, S. (author)
ICDP workshop COring the NOrth Sea Cenozoic focused on the scientific objectives and the technical aspects of drilling and sampling. Some 55 participants attended the meeting, ranging from climate scientists, drilling engineers, and geophysicists to stratigraphers and public outreach experts. Discussion on the proposed research sharpened the...
article 2016
document
Bruns, B. (author), Littke, R. (author), Gasparik, M. (author), van Wees, J.D. (author), Nelskamp, S. (author)
Sedimentary basins in NW-Germany and the Netherlands represent potential targets for shale gas exploration in Europe due to the presence of Cretaceous (Wealden) and Jurassic (Posidonia) marlstones/shales as well as various Carboniferous black shales. In order to assess the regional shale gas prospectivity of this area, a 3D high-resolution...
article 2016
document
Wildenborg, A.F.B. (author)
article 2016
document
Gradstein, F.M. (author), Waters, C.N. (author), Charnock, M. (author), Munsterman, D.K. (author), Hollerboach, M. (author), Brunstad, H. (author), Hammer, O. (author), Vergara, L. (author)
This guide provides a major revision and update of the stratigraphy of the Cromer Knoll, Shetland
article 2016
document
Candela, T. (author), Brodsky, E.E. (author)
At the field scale, nearly all fault surfaces contain grooves generated as one side of the fault slips past the other. Grooves are so common that they are one of the key indicators of principal slip surfaces. Here, we show that at sufficiently small scales, grooves do not exist on fault surfaces. A transition to isotropic roughness occurs at 4...
article 2016
document
Fokker, P.A. (author), Wassing, B.B.T. (author), van van Leijen, F.J. (author), Hanssen, R.F. (author), Nieuwland, D.A. (author)
Satellite radar data were used to estimate subsurface model parameters of the Bergermeer gas field. Directly using combinations of the line-of-sight measurements in both ascending and descending satellite geometry provided an additional dimension in the data and avoided the introduction of errors during interpolation to horizontal and vertical...
article 2016
document
Shahid, A.S.A. (author), Fokker, P.A. (author), Rocca, V. (author)
Hydraulic fracturing, natural fracture reactivation and resulting induced microseismicity are interconnected phenomena involved in shale gas exploitation. Due to their multi-physics and their complexity, deep understanding of these phenomena as well as their mutual interaction require the adoption of coupled mechanical and fluid flow approaches....
article 2016
document
Seyfang, B. (author), Aigner, T. (author), Munsterman, D.K. (author), Irmen, A. (author)
Hydrocarbon provinces require a high level of geological understanding in order to extend the lives of producing fields, to replace reserves through smaller targets and to reduce the risks of exploring for more and more subtle hydrocarbon traps. Despite a large number of existing wells in the area studied in this paper, the depositional...
article 2016
document
Milan Sanchez, M.I. (author)
Three dolomite phases in the burial dolomitization system of the Nisku Formation in central Alberta
article 2016
document
Song, J. (author), Littke, R. (author), Weniger, P. (author), Ostertag-Henning, C. (author), Nelskamp, S. (author)
A suite of drilling cores and outcrop samples of the Lower Toarcian Posidonia Shale (PS) were collected from multiple locations including the Swabian Alb and Franconian Alb of Southwest-Germany, Runswick Bay of UK and Loon op Zand well (LOZ-1) of the West Netherlands Basin. In order to assess the thermal maturity and quantify the petroleum...
article 2015
document
Fonseca, R.M. (author), Leeuwenburgh, O. (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)
Ensemble optimization (referred to throughout the remainder of the paper as EnOpt) is a rapidly emerging method for reservoirmodel-based production optimization. EnOpt uses an ensemble of controls to approximate the gradient of the objective function with respect to the controls. Current implementations of EnOpt use a Gaussian ensemble of...
article 2015
document
van den Belt, F.J.G. (author), van Hoof, T.B. (author), Pagnier, H.J.M. (author)
article 2015
document
Payros, A. (author), Ortiz, S. (author), Millán, I. (author), Arostegi, J. (author), Orue-Etxebarria, X. (author), Apellaniz, E. (author)
The early Eocene climatic optimum, which constituted the peak of the long-term early Cenozoic global warming, had a significant impact on the environmental evolution of terrestrial and oceanic areas. Surprisingly, however, its influence on continental margins is poorly known. New insights are provided from a sedimentological, stable isotope,...
article 2015
document
Shahid, A.S.A. (author), Wassing, B.B.T. (author), Fokker, P.A. (author), Verga, F. (author)
A geomechanical and fluid-flow coupled model was developed to simulate natural-fracture-network reactivation during hydraulicfracturing treatments in shale gas reservoirs. The fractures were modelled using the continuum approach in a commercial finitedifference code, labeled the "softening ubiquitous joints" model, with randomly distributed...
article 2015
document
Noorbergen, L.J. (author), Lourens, L.J. (author), Muntermann, D.K. (author), Verreussel, R.M.C.H. (author)
Between 2.58 Ma and 2.4 Ma, most of the present onshore sector of the Netherlands was an epicontinental sea. Previous studies suggest the occurrence of multiple cold and warm phases in shallow marine successions of the Maassluis Formation in conjunction with the first prominent Northern Hemisphere ice sheet expansions. Nevertheless, correlation...
article 2015
document
Peters, E. (author), Egberts, P.J.P. (author), Loeve, D. (author), Hofstee, C. (author)
Geological storage of CO2 in large, saline aquifers needs to be monitored for safety purposes. In particular the observation of the pressure behavior of a storage site is relevant for the indication of CO2 leakage. However, interpretation of observed pressure is not straightforward in these systems, due to the large number of natural processes...
article 2015
Searched for:
(1 - 20 of 79)

Pages